An associate director at Coney Island Hospital caught trying to rig bids in 2010 was somehow allowed to stay on the job through late 2013, records show.

Michael Chapman’s misconduct and the snail-paced response were only publicly disclosed Thursday when the Conflicts of Interest Board declined to impose penalties on him — saying it was because he had already resigned.

Instead, the ethics board issued a warning letter revealing that Chapman had been caught showing a bid from one hospital vendor to another vendor in April 2010.

Based on the case number, it appears that the board opened its review of Chapman’s actions in 2011 — yet he didn’t resign until December 2013.

Public records show that Chapman, a cleaning-crew supervisor, was earning more than $81,000 in 2013.

The letter also says Chapman was facing discipline for some other unspecified misconduct.

“The board understands that you resigned from HHC in the face of pending disciplinary action related to this and other misconduct,” the letter reads. “It is for this reason that . . . the Board has concluded that no further enforcement action is required in this matter.”

Officials at HHC refused to answer questions, also saying it was because Chapman had left.

Outgoing HHC president Alan Aviles didn’t respond to an e-mail seeking answers. The conflicts board refused to say when it opened its case or explain the lag time in its ruling.